We have a day trip planned where the starting point will be in Germany and going to France by train.
How does passport control work when traveling between countries? Do you have to present your passport at the time you buy the train ticket? Do they check during the train trip or is there a checkpoint? Do they check passports when you leave the train in the foreign country?
What about traveling from France back to Germany, how does passport control work in that situation?
We want to make sure we are carrying the correct documentation (stamped passports, etc.) with us as we cross borders to make sure there are no issues.
Thank you!